2018-02-15 14:38 GMT+03:00 <[email protected]>:
> Author: markt
> Date: Thu Feb 15 11:38:11 2018
> New Revision: 1824297
>
> URL: http://svn.apache.org/viewvc?rev=1824297&view=rev
> Log:
> Prevent Tomcat from applying gzip compression to content that is already
> compressed with brotli compression.
> Patch provided by burka.
> This closes #99
>
> Modified:
> tomcat/trunk/java/org/apache/coyote/CompressionConfig.java
> tomcat/trunk/webapps/docs/changelog.xml
>
> Modified: tomcat/trunk/java/org/apache/coyote/CompressionConfig.java
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/coyote/CompressionConfig.java?rev=1824297&r1=1824296&r2=1824297&view=diff
> ==============================================================================
> --- tomcat/trunk/java/org/apache/coyote/CompressionConfig.java (original)
> +++ tomcat/trunk/java/org/apache/coyote/CompressionConfig.java Thu Feb 15
> 11:38:11 2018
> @@ -186,9 +186,10 @@ public class CompressionConfig {
>
> MimeHeaders responseHeaders = response.getMimeHeaders();
>
> - // Check if content is not already gzipped
> + // Check if content is not already compressed
> MessageBytes contentEncodingMB =
> responseHeaders.getValue("Content-Encoding");
> - if ((contentEncodingMB != null) &&
> (contentEncodingMB.indexOf("gzip") != -1)) {
> + if ((contentEncodingMB != null) &&
> (contentEncodingMB.indexOf("gzip") != -1) &&
> + (contentEncodingMB.indexOf("br") != -1)) {
1) Wrong. Causes regression. It should be ( != -1 || != -1). Either
one is enough to skip compression.
2) "indexOf(br)" sounds weak, there can be false positives. But not
much of a problem: it would result in serving content as
non-compresses, it does not break the content.
For "gzip" using indexOf() is OK: It can be "x-gzip" (see 3.1.2.1.
Content Codings in RFC7231.)
[quote]
The following content-coding values are defined by this
specification:
compress (and x-compress): See Section 4.2.1 of [RFC7230].
deflate: See Section 4.2.2 of [RFC7230].
gzip (and x-gzip): See Section 4.2.3 of [RFC7230].
[/quote]
> return false;
> }
>
>
> Modified: tomcat/trunk/webapps/docs/changelog.xml
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/changelog.xml?rev=1824297&r1=1824296&r2=1824297&view=diff
> ==============================================================================
> --- tomcat/trunk/webapps/docs/changelog.xml (original)
> +++ tomcat/trunk/webapps/docs/changelog.xml Thu Feb 15 11:38:11 2018
> @@ -60,6 +60,10 @@
> specific error codes and/or exception types with the
> <code>ErrorReportValve</code>. (markt)
> </add>
> + <fix>
> + Prevent Tomcat from applying gzip compression to content that is
> already
> + compressed with brotli compression. Patch provided by burka. (markt)
Based on patch provided...
> + </fix>
> </changelog>
> </subsection>
> <subsection name="Coyote">
>
>
>
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